var fs = require("fs");
var data = "";

var reads = fs = fs.createReadStream("zuoye.txt");
reads.setEncoding("UTF-8");

reads.on("data", function(chunk) {
    data = data + chunk;
});

reads.on("end", function() {
    console.log(data);
});

reads.on("error", function(err) {
    console.log(err.stack);
});